>Developer nerfs overpowered game-breaking builds/strategies in a SINGLE PLAYER GAME
I'll give you an example right off the bat: Redhook Studios. I'm still mad about what they did to Darkest Dungeon one. If you make a game and jerk yourselves off about how hard and unforgiving it is and DARE the players to cheese it don't go around nerfing every single strategy people come up with to beat your game.